function testUrl(str_url) {
    var strRegex = "^((https|http|ftp|rtsp|mms)?://)"
    "?(([0-9a-z_!~*'().= $%-] : )?[0-9a-z_!~*'().= $%-] @)?" //ftp的user@
    "(([0-9]{1,3}\.){3}[0-9]{1,3}" // IP形式的URL
    "|" // 允许IP和DOMAIN（域名）
    "([0-9a-z_!~*'()-] \.)*" // 域名- www.
    "([0-9a-z][0-9a-z-]{0,61})?[0-9a-z]\." // 二级域名
    "[a-z]{2,6})" // first level domain- .com or .museum
    "(:[0-9]{1,4})?" // 端口- :80
    "((/?)|" // a slash isn't required if there is no file name
    "(/[0-9a-z_!~*'().;?:@= $,%#-] ) /?)$";
    var re = new RegExp(strRegex);
    //re.test()
    if (re.test(str_url)) {
        return (true);
    } else {
        return (false);
    }
}

//add different strategy to different urls
/*exports.addStrategy = function (pattern, strategy) {
 if (!strategy && pattern instanceof Object)
 router.addRoute(pattern.pattern, pattern.strategy);
 else
 router.addRoute(pattern, strategy);
 }

 //ignore some url
 exports.ignore = function (pattern) {
 router.addRoute(pattern, function () {
 return false;
 });
 }*/